Page:The histories of Launceston and Dunheved, in the county of Cornwall.djvu/249

 Cfje Castle. ITS SITE, FORM, AND AGE. The Keep stands on the summit of a conical hill, whose base may be assumed as resting upon the plain of the Castle Green on one side, and the centre of the town, adjacent to the modern corn market, on the other. The cone is chiefly natural, but partially artificial, and is flattened at the top. It rises to a height of about ?. £*)u>. 4 /toy* 120 feet. The base of the cone has an average diameter of 300 feet, and its apex of 91 feet. The Keep was a building of circular form, entered from the west. It covered the whole apex of the hill, and consisted of three wards or lines of defence. (1) The innermost wall, 10 feet thick, and about 50 feet high, left within it a space Q